Exhaust valve for pressure cookers



FIG. 1 is a front elevation view of an exhaust valve for pressure cookers, showing my new design;

FIG. 2 is a rear elevation view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof; and

FIG. 5 is a top front perspective view thereof. 

The ornamental design for an exhaust valve for pressure cookers, as shown and described. 